I wouldn't worry about it showing up too soon. 2 things. GM has not announced when the sixth gen is coming. The only official word from them has been a 2015 or 2016 model year. Also, how long past GMs estimate did it take for the fifth gen to come out? I would lean more towards a 2016 model year release. If GM doesn't yet know when it will be ready, we shouldn't start worrying. Plus the sixth gen will be awesome.